Feature

[Photograph]: Airplane Noise Analyzed during Fight

Speech “Compressed” to Carry across Atlantic

Rattlesnake’s Rattles Not Part of Its Skin

Discovery of Lizard-Eating Spiders Reported in India

First Glances at New Books

Front Matter

Bacillary Dysentery Germs May Be Carried in Many Ways

Three-Inch Thick Quartz Windows for Bathysphere

Lost Dories Located by Radio Direction Finder

World’s Deepest Mine to Be Air Conditioned

[Photograph]: As It Is Now

U. S. Has 43 Per Cent. of World’s Radio Sets